18746380836 has 36 divisors (see below), whose sum is σ = 47392935772. Its totient is φ = 6247969344.

The previous prime is 18746380823. The next prime is 18746380901. The reversal of 18746380836 is 63808364781.

18746380836 is a `hidden beast` number, since 187 + 4 + 6 + 380 + 83 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9617724900 + 9128655936 = 98070^2 + 95544^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282366 + ... + 342378.

Almost surely, 2^18746380836 is an apocalyptic number.

It is an amenable number.

18746380836 is an abundant number, since it is smaller than the sum of its proper divisors (28646554936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18746380836 is a wasteful number, since it uses less digits than its factorization.

18746380836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68700 (or 68695 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 18746380836 in words is "eighteen billion, seven hundred forty-six million, three hundred eighty thousand, eight hundred thirty-six".